Improvement in spring bed-bottoms



UNITED STATES PATENT OFFICE.

HENRY s. wENTwoRTH AND ANDREW J. wENTwoRTH, on BENTON HARBOR,

- MIcHIGAN. Y

IMPROVEMENT IN SPRING BED-BOTTOMS.

Specification forming part of Letters Patent No. 181,611, dated August29, 1876; application filed July 1, 1876.

To all whom it may concern Beit known that we, HENRY S. WENTWORTH and-ANDREW J. WENTwoRTH, of Benton Harbor, in the county of Berrien andState of Michigan, have invented an Improvement in Spring Bed-Bottoms,of which the following` is a specification:

The nature of our invention relates to an improvement in springbed-bottoms of that class wherein the mattress is supported by a numberof inverted conical spiral springs, resting on transverse slats, andlnterlocked by means of crossed-wire loops hooking them together.

The object we have in view is-to give such a superstructure an elasticor yielding support by supporting each slat, near the end, by

. a spiral spring, interposed between it and a longitudinalcarrying-bar, and to" provide a simple means for elevating the head ofthe bedbottom.

Figure l is a perspective view. Fig. 2 is a bottom plan. Fig. 3 is anelevation ofthe spring before fastening it to a slat. Fig. 4 is asectional elevation, showing the spring fastened to the slat and Fig. 5is a side elevation of a portion ofthe bed-bottom.

ln the drawing, A represents a series of inverted conical andspirally-coiled springs, each of which terminates its lower convolution,which is horizontal, in an end, a, turned vertically downward, in theaxis of the cone. These springs are secured to a series of transverseslats, B, by passing the end a through a hole bored therein for eachspring, and then riveting over the projecting end, as seen in Fig. 4.The springs are held in position by diagonal wire hooks b, except at thesides and ends, where the hooks pass from one spring to the next inline. Under each side of the bed-bottom there is a carrier-bar, C,between which and the slats B, except the two nearest the head, isinterposed a spring, A, under the end of each slat B, to support thelatter in such a manner as to allow it to yield under pressure, whilethe springs A will conform themselves to the outline of the weightimposed thereon. The springs Al are spiral cones, their upper ends beingsecured to the slats, in the manner already described, while their lowerends are secured to the carrierbars by staples. in position withrelation to each other by light elastic wooden slats D, longitudinallyplaced under and riveted to them but under the two slats B, nearest thehead, is placed a block, c, which elevates the head one above the secondone, and both above the rest, thus giving the head of the bed-bottom anelevation, which dispenses with the bolster usually placed at the headofthe bed. The head ends of the carrier-bars are connected by a girt, E,which also supports rigidly the head ends of the slats D.

What we claim as our invention is vl. The combination, with the springsA, connected by the hooks b, and the slats B, as described, of thecarrier-bars G C, springs A', slats D, and girt E, substantially as andfor the purpose set forth.

2. In a bed-bottom, the combination of the springsA and slats B of theslats D, having the blocks c, substantially as described and shown.

HENRY S. WENTWOBTH. ANDREW J. WENTWORTH.

Witnesses:

A. PLUMMER, HENRY C. FR E A lim E L ND The cross-slats B are held

